Question # 1

The accepted value for speed of light in vacuum

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2.99 x 10⁸m - sec^-1

2.99 x 10⁶m - sec^-1

2.99 x 10⁸km - sec^-1

2.99 x 10⁸m - h^-1

Image formed by a concave lens is

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Real

Virtual

Erect

None of these

The speed of light was measured correctly by

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Galileo

Michelson

Newton

Maxwell

Which is not the essential component of a spectrometer.

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Collimator

Telescope

Turntable

Microscope

A layer over the central core of the jacke is called.

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Jacket

Plastic

Cladding

Rubber

The focal length of a concave lens is always

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+ve

-ve

Zero

None of these

The final image formed by a simple microscope.

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Virtual and inverted

Real and erected

Virtual and erected

Real and inverted

If focal length of objective and eye piece is 0.5 m and 10 cm respectively then magnifying power of telescope will be.

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0.5

5

10

20

The magnifying power of an astronomical telescope is 10. If the focal length of objective is 100 cm, then what is the focal length of eye piece.

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10 cm

100 cm

1000 cm

5 cm

A convex lens can be used as

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Simple microscope

Compound microscope

Telescope

Spectrometer

The ratio of size of image and size of object is

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Focal length

Magnification

Resolving power

Principle focus

A convex lens acts as diverging lens if the object is placed at

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F

2F

Between F and 2 F

Within the F

The magnifying power of a convex lens of focal lendth 10 cm is

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7

9.6

11

3.5

More details of an object can be seen with a microscope by using

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Green light

Red light

Yellow light

Blue light

If an object lies at focus point F in front of a converd lens, its image is formed at.

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2F

F

3F

Infinity

The optical fiber is covered for protection by a

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Glass Jacket

Plastic Jacket

Copper Jacket

Aluminum Jacket

__ will travel faster than other through an optical fibre.

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Ultraviolet light

Visible light

Infrared light

White light

Multimode step index fiber is useful for.

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Long distance

Sort distance

Very long distance

Infinite distance

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